Litten is one of three starter Pokémon of Alola available at the beginning of Pokémon Sun and Moon. Along with Rowlet and Popplio, it was the second Generation VII Pokémon to be revealed to the public on May 10, 2016.

Litten is a quadruped, feline Pokémon covered with primarily black fur. There are two red stripes around each of its legs and two horizontal stripes with a vertical stripe across them on its forehead. The lower part of Litten's face is also red, and there is a large tuft of fur on each cheek. Its eyes are red with yellow sclera and it has short, pointed ears with pale gray insides. It has a short muzzle with a tiny, black nose. A tuft of fur sits at the end of its long tail. Litten's fur produces flammable oils. This allows it to collect fur while grooming, then use it form fireballs. When this Pokémon begins shedding, it burns all its fur in a blaze.